Front landing gear uncommanded retraction

**srino1996** · 03-27-2021, 11:20 AM

I have a Momentum 351m toy hauler in enclosed storage. When I stored it from last use, approx 1 month ago, I had it auto leveled. When I came to check on it a week ago the front landing gear was completely retracted with the rear and middle leveling jacks still extended. There are no leaks that I can see and the fluid is full. Any idea why this would happen?

**Bungy** · 03-27-2021, 02:44 PM

Originally Posted by srino1996

I have a Momentum 351m toy hauler in enclosed storage. When I stored it from last use, approx 1 month ago, I had it auto leveled. When I came to check on it a week ago the front landing gear was completely retracted with the rear and middle leveling jacks still extended. There are no leaks that I can see and the fluid is full. Any idea why this would happen?

Sounds like fluid leaked past a valve back into the tank.

**srino1996** · 03-27-2021, 02:55 PM

Originally Posted by Bungy

Sounds like fluid leaked past a valve back into the tank.

That’s kinda what I was thinking but wasn’t sure how to test that theory. It’s happened a couple times now.

**Bungy** · 03-27-2021, 03:00 PM

Originally Posted by srino1996

That’s kinda what I was thinking but wasn’t sure how to test that theory. It’s happened a couple times now.

Ya, you'd have to deadend the system somehow to prevent the flowback.

**srino1996** · 03-27-2021, 03:03 PM

Originally Posted by Bungy

Ya, you'd have to deadend the system somehow to prevent the flowback.

Thank you for the info. Much appreciated

**el Rojo** · 03-27-2021, 04:33 PM

Originally Posted by srino1996

I have a Momentum 351m toy hauler in enclosed storage. When I stored it from last use, approx 1 month ago, I had it auto leveled. When I came to check on it a week ago the front landing gear was completely retracted with the rear and middle leveling jacks still extended. There are no leaks that I can see and the fluid is full. Any idea why this would happen?

You don't mention the year model of your rig. Do you have the One-Control? Could somebody else be raising their jacks and yours too? I have a 2004 Lance truck camper we bought at a RV show. The factory rep could raise and lower all campers at the show with 1 module.

I don't have the One control so this is just a guess from what I've seen in the past.

Red

**Viper02** · 03-27-2021, 06:45 PM

Since you have NO external leaks the only two things that will cause both front LG to retract ( loose extend hyd pressure is)

1. Either the manual over ride screw on the Hydac valve isn’t fully CCW allowing fluid to flow past or the valve is sticking and not closing completely

2. You have an internal leak in one of the two Frt LG.. they are connected in tandem so wha5 affects one affects the other..

There is an easy test you can do yourself to verify if you have an internal leak on one of the two front LG

https://lci-support-doc.s3.amazonaws...cd_0001910.pdf

Pic of Hydac valve on Frt LG.. only one for both. My finger points to the manual override screw. Use Allen wrench and make sure it’s turned fully CCW